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I'm surprised your DMM did so well with the ripple that must have been there with a single phase supply
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Well, there was quite a bit of ripple. The DC reading randomly wandered in a 50-80 mA range, plus a higher frequency 30-40 mA AC component. Lets hear it for eyeball averaging.
Plus, this board was one of the early victims of exploding cap syndrome - the replacement in the regulator has triple the capacitance and half the ESR. Throw in that CPUburn is a steady running program...
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The green line looks a bit off. I'd expect it to split the difference between the other two lines. Still, those are pretty good results.
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The graph was made with only two significant digits. Give me a few days, and an ADC, and it'll look better. Current vs. time is gonna be sweet.